WASHINGTON – The Supreme Court on Monday refused to hear the case of two Guantanamo Bay prisoners who want to challenge the legality of military commissions.

Salim Ahmed Hamdan and Omar Khadr face commission trials – Hamdan for acting as a driver and bodyguard for Osama bin Laden, and Khadr for throwing a grenade that killed a U.S. Green Beret soldier.

The court's action follows its April 2 decision not to step into related aspects of the legal battle regarding other Guantanamo Bay detainees. The issue there is whether the prisoners may go to federal court to challenge their confinement.

It was Hamdan's military commission case that led to a repudiation of the Bush administration last year in the Supreme Court. The court ruled in favor of Hamdan, declaring President Bush's system of military commission trials violated U.S. and international law.

Subsequently, the Bush administration and its Republican allies on Capitol Hill pushed through a law reconstituting the military commissions, giving them the congressional imprimatur that had been missing from the earlier system created by executive order.